There are shims to use between the spindle and the housing that will change the camber angles. You need to get a base of what it is now and then get the correct shim to adjust the camber. Both of these methods take time and patience, but in the end you WON'T wear tires. Also take the specs on front end alignment with a grain of salt, there is NO WAY that 1 1/2 degrees of positive camber will NOT wear the outside of the tires, way to much camber! I always went for 0-1/4 degree positive, as much caster as I could get and usually 1/8 to 1/16 toe in. Worked for me for 50 years!!!